Air and fuel mixing device



Patented Get. 23, 1928.

UNITED STATES HENItY MKCOGAN, OF CHARLESTOIT, WEST VIRGINIA.

AIR AND ,FUEL -MIXING DEVICE.

Ap t on d ru 12 2 eria li -.18 3

uid fuel and to lessen the rate of deteriora tien of the engine lubricating oil by preventing non-gasified fuel from entering the en gine cylinders and working its way into the engine crankcase.

In the accomplishment of the foregoing objects, I employ a device having a series of line-meshed wire or foraminous cones locatet at a convenient place between the usual carbureter and engine intake manifold. The cones have reversed apices which point against the direction of fuel flow. The inrushing and air carries the entrained particles of liquid fuel and distributes their. in a fine film over the surface of the for-aminous cones so that, asthe air and gas pass through the cones, the film is completely evaporated and the resultant gas is thoroughly mixed before it reaches the engine cylinder.

Fig. 1 is a diagrammatic drawing of a side elevation of an engine showing in dotted lines my invention applied in the intake pipe between the carbureter and the intake inanifold.

Fig. 2 is a longitudinal sectional view showing one form of my invention.

The device of my invention comprises a foraminous tube 10 having attached foraininous cones 11, 11. The apices 12, 12 of these cones are reversed and are preferably joined together by a metal rod 18. A flange member 14 is attached to the outer circumference of the tube 10 for securing it at some point such as the joint 15 between the carbureher and the intake pipe of the engine. The tube 10 may be made of fine woven wire mesh and it is preferably of such a diameter as to escape touching the inner walls of the intake pipe, thus leaving a substantial evaporating surface.

When the air passes through the carbureter it vaporizes only part of the liquid fuel. The balance is carried along as an entrained liquid which. is ordinarily sucked into the engine cylinder in a non-explosive condition. This causes the fuel to be wasted, and carbon to form rapidly, consequently reducing the efficiency and usefullife of the engine and dilutes the oil injthe crank case. i

device causes tliei unvaporized fuel to leave the inside walls of the pipe (where according to my observation it tends to form or gather) and be drawn over the first or lower cone center-wards where the fuel n'iiicture contains a larger proportion of air. Vhile the liquid is being thus drawn towards the more central portions of the intake pipe it spreads or films out over the foraminous or fine mesh wire screens. At the same time the air in the central portion of the pipe is being defl cted outward and is made to evaporate this fluid film. In the succeeding cones this process is repeated so that by the time the fuel has passed through the various screens of my device it should be completely gaseous.

My fuel .miXing device may employ two or more of these introverted cones 11. A metal rod 13 may be connected to each apex of the cones for the purpose of adding to the mechanical strength of my device. The number of cones which may be most effectively employed in vmy invention depends upon the grade of fuel employed, the type of carbureter used, the size of the intake pipe and the force of the suction.

The screens in my device effectively prevent back fires reaching the carbureter, catch any dirt, dust, or lint which would otherwise enter the combustion chambers of the engine and effect a general increase in the efficiency of the internal combustion engine to which it is applied.

Altho I prefer to make the tube 10 of fine wire mesh it should be understood that certain advantages might be attained by making the tube of sheet metal without perforations. The flange 14 may be formed integral with the tube 10 or suitably secured to it. It should also be understood that the term cone is used in the claims in its broad significance as covering a true cone or a conic section or frustuni.

I claim:

1. A fuel mixing device for internal combustion engines adapted to be mounted within the fuel intake pipe between the carbureter and the intake manifold, comprising a foraminous tube, a supporting flange for said tube, and a plurality of spaced foraminous cones attached to said foraminous tube, each of said foraminous cones having a reversed central section.

2. A gaseous fuel mixing device for internal combustion engines adapted to be mounted in the fuel intake pipe between the carbureter and the manifold and comprising in" combination a foraminous truncated cone, a foraminous cone mounted within the truncated cone, the base of the cone being connected contiguous the smaller end of the truncated cone, the apex of the cone being adjacent the base of the truncated cone and substantially centrally located thereof, a foraminous tube connected to the base of the truncated cone and surrounding the same, said tube being provided with means for securing it with in a fuel intake pipe.

A gaseous fuel mixing device for internal combustion engines adapted to be mounted Within the fuel intake pipe between the carbureter and manifold andcomprising in combination spaced foraminous truncated cones, a foraminous cone mounted within each of said truncated cones with the base of each cone being connected contiguous the smaller end of one of the truncated cones, the cones sloping inwardly toward the base of the truncated cones and being inverted with respect thereto and located substantially centrally thereof, a reenforcing means connecting the apices of said cones, a foraminous tube connected to the bases of said truncated cones and surrounding the same, said tube being provided with means for securing it within a fuel intake pipe.

HENRY M. COGAN. 

